Question

The topic for the discussion is “You are standing on the shore of
Lake Manchar which is the largest freshwater lake in Pakistan and
one of Asia's largest. It is located west of the Indus River, in
Dadu District. You spot a tasty fish swimming some distance below
the lake surface.

(a) If you want to spear the fish, should you aim the spear (I)
above (II) Below or (III) Directly at the apparent position of the
fish?
(b) If instead you use a high-power LASER to simultaneously kill
and cook the fish, should you aim the LASER (I) Above (II) Below,
or (III) Directly at the apparent position of the fish?”
Elaborate your answer by giving a solid reason.